Lich Van Nien - Tu Vi 2017 is an Android application that provides a comprehensive Vietnamese calendar system for users. The app allows users to view both the lunar and solar calendars according to their preference. It also features a range of functions such as viewing good and lucky days, traditional customs and festivals, and horoscope readings. Users can also set reminders for important dates like birthdays and anniversaries, as well as take notes according to the lunar or solar calendar. The app also includes daily weather updates and countdowns to important events. Overall, Lich Van Nien - Tu Vi 2017 is a useful and informative application that fulfills the needs of Vietnamese users looking for a complete calendar system.